# 嵌套循环
for i in range(1,10):
    for j in range(1,i+1):
        print('*',end="")
    print()

# 九九乘法表
for i in range(1,10):
    for j in range(1,i+1):
        print(i,'*',j,'=',i*j,end="\t")
    print()